膜透過性の解釈
> Mw = 350
> pKa = 9.5
> sigma = 1.0
> R = 8.62
> e_g = 1.22
> kai = 0.7
> Nav = 6.02 * 10^23
> kb = 1.38 * 10 ^ -16
> T = 273.15 + 37
> n = 0.006915
> r <- (3*Mw/(4*pi*Nav*sigma))^(1/3)
> r
[1] 5.17759e-08
> D <- kb*T/(6*pi*n*r)
> D
[1] 6.342054e-06
> r= 5.17759 # A
> F_r_R <- (1-(r/R))^2*(1-2.104*(r/R)+2.109*(r/R)^3-0.95*(r/R)^5)
> F_r_R
[1] 0.01897611
> r= 5.17759
> F_r_R <- (1-(r/R))^2*(1-2.104*(r/R)+2.109*(r/R)^3-0.95*(r/R)^5)
> F_r_R
[1] 0.0189761
> Ppara <- e_g*D*F_r_R*(kai/(1-exp(-kai)))
> Ppara
[1] 2.041593e-07
> 2.041593e-07/0.42e-6 * 100
[1] 48.60936 # %